every eighth hour

USAGE SUMMARY

The phrase "every eighth hour" is correct and usable in written English.
It can be used to describe an event or action that occurs at regular intervals of eight hours. Example: "The medication should be taken every eighth hour to ensure its effectiveness."

✓ Grammatically correct

Science

Human-verified examples from authoritative sources

Exact Expressions

4 human-written examples

Consecutive sampling of aldehydes every eighth hour as well as total aldehyde sampling was performed during the first 5 days after application of the paints.

Industrial Crops and Products

However, the limits of agreement were >20% with either the single or every eighth hour calibration protocol.

Critical Care

Two different ways of calibration were used: using the first plasma value only (MD1) or recalibration to plasma glucose every eighth hour (MD8).

Critical Care

Two different calibrations were used, a single calibration (MD1) to the first plasma value and one calibration every eighth hour (MD8).

Critical Care

Human-verified similar examples from authoritative sources

Similar Expressions

56 human-written examples

CSF and blood samples were obtained every second hour during a 16-hours study period and were analyzed for bacterial concentrations by quantitative cultures (lower detection level: 50 CFU/ml) and WBC on an automatic cell counter (Swelab, Åstad, Sweden).

BMC Infectious Diseases

Every third hour, you squeeze a Monopoly-race-car-sized amount onto the tips of your fingers (right hand), and then dab your ends with it.

The New Yorker

N = 34 professional driver students drove in a high-fidelity driving simulator at 80 km/h for 55 min every third hour during 36 h of sustained wakefulness.

Accident Analysis & Prevention

Eight blood samples were drawn each day (every third hour) on 8 days of the protocol and analyzed with respect to IL-6 and TNF-α.

Brain, Behavior, and Immunity

Urinary output was measured, and urine samples from both kidneys were collected at baseline, after 90 min and thereafter every second hour.

Intensive Care Medicine Experimental

The occurrence of aggressive behaviour, play behaviour and synchronous resting was recorded throughout the day (i.e. every third hour for 15 min during 24 h) on day 1, day 5, day 19 and day 33 after mixing.

Applied Animal Behaviour Science

Imagine a job that only paid you for every second hour you worked and threatened to have you kicked out of the country if you complained.

Vice

Expert writing Tips

Best practice

In scientific writing, use "every eighth hour" to specify precise intervals for sampling, measurements, or administering treatments, ensuring clarity and reproducibility of the methodology.

Common error

Avoid using "every eighth hour" when the intended meaning is simply "approximately every eight hours". If the timing isn't precise, use qualifiers like "about" or "around" to prevent misinterpretation.

Linguistic Context

The phrase "every eighth hour" functions as an adverbial phrase, modifying a verb by specifying the frequency or interval at which an action occurs. Ludwig AI indicates that it's a grammatically correct construction.

Expression frequency: Rare

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

0%

Ludwig's WRAP-UP

In summary, the phrase "every eighth hour" is a grammatically correct adverbial phrase used to specify actions occurring at eight-hour intervals. Ludwig AI confirms its correctness. It's most commonly found in scientific contexts requiring precise timing, though it's relatively rare overall. For broader audiences, consider using the simpler "every eight hours". When precision and clarity are paramount, particularly in scientific writing, "every eighth hour" provides a specific and reliable way to communicate timing. It appears in journals such as Industrial Crops and Products and Critical Care.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

Every eight hours

More common and direct synonym. It is grammatically correct and clearer to understand.

Each eighth hour

Simple and direct replacement for "every".

Once every eight hours

Adds emphasis on the frequency of the action being performed.

Every eight-hour period

Emphasizes that the time interval is a period of eight hours.

At eight-hour intervals

Formal and highlights the recurring timeframe.

Every 480 minutes

Specifies the interval in minutes instead of hours.

Eight hours apart

Focuses on the separation in time between occurrences.

Every workday hour

Implies a regular schedule of sampling related to work

On an eight-hourly basis

Formal alternative using "basis" to show recurrence.

Eight hours on the clock

Colloquial way of describing an event taking place every eight hours.

FAQs

What does "every eighth hour" mean?

The phrase "every eighth hour" means that something occurs repeatedly at intervals of eight hours. For example, medication might be administered "every eighth hour".

How can I use "every eighth hour" in a sentence?

You might say, "Samples were collected "every eighth hour" to monitor changes in the compound concentration."

Which is correct: "every eighth hour" or "every eight hours"?

Both "every eighth hour" and "every eight hours" are grammatically correct, with the latter being more common and easily understood.

What are some alternatives to using "every eighth hour"?

Alternatives include "once every eight hours" or "at eight-hour intervals", depending on the desired level of formality and emphasis.